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Thanks for your comments Crackerjack47. I've attached a sketch to better explain the question. The stopper will be at/near midspan of the crane girder between building columns. The stiffeners of the support will be welded to the top flange of the girder as shown in the sketch...

I have a steel support structure for a retractable crane stopper which is to be installed to an existing crane girder. The support stucture consists of welded plates to which the pneumatic stopper is fixed above. The crane girder is simply supported by the building columns and the stopper will...

There is no air flow system in place below the building. The building has 4" rigid insulation along exterior of foundation walls and a horizontal layer of 4" insulation 3ft below the grade of the interior of the building. The heat is kept inside the building and I imagine that the insulation is...

Maybe my sketch wasn't clear enough, but the elevated steel floor would actually be on the interior of the heated building. The building has 4" rigid insulation on the outside of its foundation walls as well as a 4" horizontal layer of insulation about 3ft below the grade level of the interior...

The insulation is placed on top of the footings, below foundation wall.

The site is located near the 62 parallel in northern Quebec. Near the village of Salluit. The minus 8 is the avg temperature of the permafrost year round. As for the local geology: mainly consisting of gravels, ice rich silts and sand. The rock level is fairly high, varying from 10ft to 20ft...

Hi everyone, I'm working on a project in a remote region of continuous permafrost in northern Canada. The average permafrost temperature is -8deg C, active layer is approx. 3ft. My client has an existing structure in place; a steel structure on concrete foundation walls, columns on pilasters...

Hi everyone, I'm working on a project in a remote region of continuous permafrost in northern Canada. The average permafrost temperature is -8deg C, active layer is approx. 3ft. My client has an existing structure in place; a steel structure on concrete foundation walls, columns on pilasters...

My question is regarding the application of Frost Protected Shallow Foundations (FPSF) on existing basement foundations. I would like to excavate and pour a concrete stairway from the exterior of the house to the basement. An opening will be cut in the existing foundations for a doorway. The...

Thanks for the reply. So I take it that if I were to design closer to but slightly above the allowable load, I should be ok?

I'm designing a connection between two light guage steel framing members. The connection will need to withstand a load of 3100lb. I'm looking to use teks fasteners if possible. Otherwise 1/4-20 hex bolts. Need to determine number required and configuration. My question is: when designing for...